694 PROCEEDINGS OE THE OTTAWA MEETING 



imbedded in the vast mass of morainal material that stretches across these 

 states. From this fact it is evident that, wherever the source may be where 

 they naturally occur, they must exist in considerable abundance. There must 

 probably be, therefore, a diamond field in Canada that may be important if it 

 can be found, although, from the small or very moderate size of the stones 

 known, it cannot compare in any degree with the wonderful mines of South 

 Africa. Under the direction of Doctor Ami a number of surveying parties 

 along the line of the new Transcontinental railway, from Quebec to Winnipeg, 

 are now on the lookout through all the region north of the Great lakes. But, 

 on the other hand, the source may be farther north, in the unexplored wilder- 

 ness of Ungawa. This is the view taken by Professor Hobbs, of Wisconsin, 

 based on a careful study of the glacial striations left on the rocks, indicating 

 the direction of ice-movement. 



Some years ago there was for a time quite an interest in the suggestion of 

 a possible diamond field in Elliott county, Kentucky. Certain igneous dikes 

 in that region were found to resemble the rock in which the diamonds occur 

 at Kimberley, in South Africa, and to contain some similar associated min- 

 erals, such as pyrope garnets ("Cape rubies"), etcetera; but careful examina- 

 tion failed to find any diamonds whatever. Recently the matter has been taken 

 up again, and proposals have been made for extensive operations ; but the fact 

 remains that the first diamond has yet to be discovered, and there seems to be 

 no warrant for undertaking such enterprises. W. C. Phelan, geologic aid of 

 the U. S. Geological Survey, visited Elliott county, Kentucky, and spent con- 

 siderable time in the preparation of an economic bulletin of the Canova quad- 

 rangle. Although he located a new dike, he was unsuccessful in finding the 

 diamond itself. Notwithstanding that statements were current in the adjoin- 

 ing city of Grayson that diamonds had been found, yet he could not substan- 

 tiate the finds. 



Professor J. F. Kemp has located a similar dike, penetrating a coal vein in 

 Fayette county, southwestern Pennsylvania, which he is describing at this 

 meeting. Although the coal seam was entirely ruined by the penetration of the 

 peridotite for a distance of some 20 feet, diamonds were not found. Professor 

 Kemp at this meeting gives the petrographic depths of this occurrence on Mid- 

 dle run, a tributary of the Monongahela, in the Masontown quadrangle. 



The paper was discussed by Eobert Bell, A. C. Lane, J. M. Clarke, 

 A. P. Coleman, H. M. Ami, A. P. Low, and J. F. Kemp. 



The second paper was 



IGNEOUS ROCKS OF THE EASTERN TOWNSHIPS OF QUEBEC 

 BY JOHN ALEXANDER DRESSEE* 



Eemarks were made by G. 0. Smith, with reply by the author. The 

 paper is published as pages 497-522 of this volume. 



* Introduced by Dr F. D. Adams. 



